In a 25-second video posted Tuesday on the Tennessee Titans' web site, the 30-year-old Shaw reveals he was recently diagnosed with ALS and pours a bucket of ice water on his head as part of the Ice Bucket Challenge to raise money and awareness to battle the disease.

Shaw then challenges "the Tennessee Titans organization, James Franklin and the Penn State football team and my Clarenceville community" to do the same.

"I'm here today to stand up and fight with all of you against this disease," Shaw says in the video.

Before entering the NFL, Shaw played at Penn State and Clarenceville High School in Livonia, Michigan. He started 32 games at Penn State, where he played running back, middle linebacker, outside linebacker and defensive end.